Method for determining the flank face contour of a gear skiving tool, gear skiving tool and use thereof

A method for determining the flank face contour, including a clearance angle, of a blade-like tool or work tooth of a tool for the gear skiving of workpieces, the method comprising:

• defining the contour of the face of the tool, the face having cutting edges, and calculating the progression of the path motion of the face of the tool during metal-cutting gear skiving relative to a rotating workpiece, wherein the relative motion is defined by a predefined or predefinable transmission ratio between the tool and the workpiece and a crossed-axis angle between a rotational axis of the workpiece and a rotational axis of the tool, which transmission ratio is determined by a respective number of teeth, and a desired tooth cross-sectional contour of the workpiece;
• determining a tangential velocity of each point of a cutting edge of the tool during metal-cutting gear skiving relative to the workpiece in the form of vectors, and representing the vectors graphically as bundles of lines in a direction opposite to the direction of motion at each point of the cutting edge and determining a closed envelope surface, within which no lines lie;
• choosing the envelope surface, plus a desired clearance angle as the shape for the tool flank face or flank face of a tool tooth;
• and
• producing a tool with the determined flank face contour including the clearance angle to provide the blade-like tool or tool with work teeth for the gear skiving of workpieces, and providing the tool with a tool guide, cutting direction opposite the feed direction, wherein teeth of the workpiece are machined in the cutting direction opposite to the feed direction.

A method for determining a flank face contour, including a clearance angle, of a tool or work tooth of a tool for gear skiving of workpieces, the method comprising:

• defining a tool face contour of a flank face of a tool structure, the tool face contour comprising cutting edges;
• determining a transmission ratio between the tool structure and a rotating workpiece structure and a crossed-axis angle between a rotational axis of the workpiece and a rotational axis of the tool structure based on a number of teeth and a desired tooth cross-section contour of the workpiece structure;
• calculating motion of the flank face of the tool structure relative to the workpiece during a metal-cutting gear skiving process based on at least the transmission ratio;
• determining a vector of each point of a cutting edge of the tool structure to provide a number of vectors, each of the vectors corresponding to a tangential velocity of each point of the cutting edge of the tool structure during the metal-cutting gear skiving process relative to the workpiece, wherein the vectors are displayed graphically as bundles of lines in a direction opposite to a direction of motion at each point of the cutting edge;
• determining a closed envelope surface, wherein no lines are provided in the closed envelope surface;
• and
• choosing the envelope surface and a desired clearance angle as a shape for the flank face of the tool structure or the flank face of a tool tooth of the tool structure.